This Introduction to ZX Spectrum BASIC is as apt today as it was when I first read it 35 years ago. Explanations are clear with well thought through examples and a touch of humour.
When I wrongly credited the author with penmanship of the Example programs I received a delightful email that it was his sister Penny, who worked for Nine Tiles, who had written or adapted the works. She also worked for Jupiter Cantab, perhaps part-time as her main career was as an international mezzo-soprano.